Sustained Acoustic Medicine for Chronic Low Back Pain Secondary to Herniated Nucleus Pulposus or Other Conditions

Inclusion Criteria: * Diagnosis of Chronic low back pain, may be secondary to herniated nucleus pulposus (HNP) or other causes * 18-60 years of age, inclusive * Has Numeric Rating Scale (NRS) pain severity score of at least 4 for a minimum 5 days over the 1 week Baseline Period prior to being randomized to treatment * Pain lasting \>3 months * Has MRI from within 2 months prior to Screening (If no recent MRI is available, then subject must agree to have MRI performed prior to randomization of treatment) * If pain is secondary to HNP: MRI within the last 2 months demonstrating the presence of a herniated disc; herniated disc is laterally located and not centrally located; herniated disc is not sequestered * Has the presence of radicular pain as assessed by a health care practitioner * Is willing and able to self-administer treatment daily within their place of residence or during normal daily activity, excluding bathing, showering, or other water activities which may result in submersion of the study device. * Is maintained on a stable pain management regimen, which may include opioid and/or non-opioid analgesic medications, but must be willing to keep dosage(s) stable through the study period; any dose adjustments that the investigator feels are required during the study period must be discussed with the study sponsor; and the use of any medications must be documented in the subject's Medication Log. * Be willing to discontinue any other interventional treatment modalities on the lower back during the study period (e.g., transcutaneous electrical nerve stimulation, electronic muscle stimulation, traditional ultrasound). Exclusion Criteria: * Cannot successfully demonstrate the ability to put on and take off the device. * Displays any condition which, in the judgment of the investigator, would make participation in the study unacceptable including, but not limited to, the subject's ability to understand and follow instructions. * Participated in a clinical trial for an investigational drug and/or agent within 30 days prior to screening. * Has arthritis, bone spurs, stenosis, fusions, or implants near the treatment area. * Is pregnant. * Is a prisoner. * Is non-ambulatory (unable to walk). * Has a pacemaker. * Has a malignancy in the treatment area. * Has an active infection, open sores, or wounds in the treatment area. * Has impaired sensation in the treatment area, such as caused by chemotherapy or anesthesia. * Has a known neuropathy (disease of the brain or spinal nerves). * Has a hereditary disposition (tendency) for excessive bleeding (hemorrhage). * Has peripheral artery disease. * Has BMI ≥30